Tamrons sp 85mm f18 di usd lens uses ld low dispersion and xld extra low dispersion glass elements in the optical design to minimise colour fringing and to achieve outstanding sharpness and clarity plus tamronrsquos fluorine coating has been applied to the front element to help repel water oil makes the front element easy to keep clean condensation free in addition this new lens is constructed with tamronrsquos new sp design incorporating a new look feel which includes large